Auxillary Fuel Tank Install

[rkadc]

Got a couple questions. My dad bought a 40gal auxillary tank and I'm going to install it for him this weekend.

I was just going to route the plumbing straight into the top of the tank and from now fill it from the auxillary tank, but I was told if I were to do that it would mess something up with the computer as the auillary tank emptied into the stock tank while driving down the road. So I guess I need to add a check ball valve?

If I do install a ball valve, I was told he couldn't drive with it open because the fuel draining from one tank to the other would once again mess with the computer. So that pretty much defeats the purpose of an auxillary tank if he still has to stop to open the valve and wait for the stock tank to refill.

So what is the best way to go about installing this tank without running into issues?

[First_Ford]

The problem with the computer is that it senses that the gauge did not move for an extended time, and trips a fault code. the best thing to do is either install an electric valve or a fuel pump to add fuel. this is how the tranferflow tanks work.

[rkadc]

Oh alright! That makes sense.... So I'll probably go with the electric valve then and just wire it into an uplifter. Another question then, if I go with an electric valve or pump, could he transfer fuel will driving then once the tank is full, turn off the valve/pump?

[First_Ford]

I would still use the overflow check valve. It will work as long as the switch is located within reach. This has been my plan to do for mine but have not looked into sourcing the parts. let me know what you find and how ya made out.

[rkadc]

Oh after looking at electric valves and pumps. I'm just going to pick up electric pump which looks like it'd be easier to do. But I'll make sure to take some pictures of my install and I'll post them up.

[rlpzzz]

For what it's worth, my father has an 80 gallon aux. tank in his 08 and has never had a problem with the computer or codes. His is gravity fed and has been that way for a year or two.

[pvsaint]

I don't have any problems with my auxiliary tank feeding the main tank. When the aux. is empty the main tank fuel gauge starts its way toward empty and this is how I know my aux. is empty. I have also found that using the diesel install kit from RDS (bought it from Northern Tool) makes for the easiest and best way to transfer the fuel.
You can look at it at this link.
http://www.northerntool.com/shop/too...5501_200315501

[rkadc]

Thanks for the link... I think I'm just going to run it as a gravity feed and see if that does indeed trip a code. If it does then I'll go with an electric fuel pump

[jberzerker]

A buddy of mine just used a 12V solenoid tied in to the uplifter switch on his aux tank and it works like a dream.